Friction device.



P. H. CUSTIS.

FRICTION DEVICE.

APPLICATION FILED saw. 8, 101-4.

1,127,600. Patented Feb. 9, 1915.

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wilnesaesf 15206211127 UNITED STATES PATENT @FFKCE.

PARKE H. CUSTIS, 0F BRODKLINE, MASSACHUSETTS, ASSIGNOB TO THE CORKINSERT COMPANY, OF BOSTON, MASSACHUSETTS, A CORPORATION OF MAINE.

FRICTION DEVICE.

Specification of Letters Yatent.

Patented Feb. 9, 1915.

To all whom it may concern:

Be it known that I, PARKE H. Opens, a citizen of the United States,residing in Brookline, in thecounty of Norfolkand State ofMassachusetts, have invented an Improvement in Friction Devices, ofwhich the following description, in connection with the accompanyingdrawings, is a specification, like characters on the drawingsrepresenting like parts.

This invention has for its object to increase the gripping efficiency ofsubstantially thin objects or bodies, such, for instance, as the rim ofsteel or other metal pulleys, bands, disks, rings, brake-shoes and thelike, by providing such bodies with cork or other non-metallic frictiondevices.

The present invention is herein shown as embodied in a steel pulleyhaving a thin rim, which, in accordance with this invention, is providedwith non-metallic inserts, which form part of the outer surface of thepulley and increase the friction between the pulleyand the belt withwhich it is used.

The invention has for its object to provide a construction in which amaximum gripping area br surface is obtained and the presence of sharpedges on the surface of the pulley are avoided,\thereby preventing thebelt being cut or otherwise in ured by such edges. To this end, the rimof the pulley is provided with a series of holes. which extend throughthe rim and each hole is preferably made of two diameters, so as toform-between the outer and inner surfaces of the pulley an annularshoulder to outwardly extended flange on a support an r which isinserted into said hole metal cup,

and projects beyond the rearsurface ofthe The cup referred to isdesigned to receive an ,insert of non-metallic material, preferablycorlgin natural state, which is forced into the cup and WhICl'lpro ects.be yond the open mouth .ofthe cup and fills the ortion of;the holein-therim WhlChlS of argerdiameter thereby covering the edges -of..the holeand also the flange-of the-cup.

. The particular features; of theinvention will be pointed out in theclaims at theend of this specification V Figure 1 is a side elevationofa pulley elevation on'an 7 embed this invention Fig.2 a side ymgenlarged scale'pf aiportion ofthe rim shown in Fig. 1, with a part insection. Fig. 3, a plan of a portion of the rim shown in Fi 1, and Figs.4 and 5, details in section on an enlarged scale.

The device herein shown as embodying this invention isa steel pulley ofknown construction and having a thin rim or. The rim a is provided witha series of holes or openings extended through it, and distributed overthe surface thereof as desired,

said openings being made as herpin shown of two portions 6, c, ofdifferent diameters, the portion 1; being of larger diamcterand extendedfrom the outer surface d of "the rim and forming with the portion a ofsmaller diameter an annular shoulder 10, which is located below theouter surface of the rim and forms a support for an annular flange 12 ona metal cup 13, which is preferably formed of sheet metal and is made ofsubstantially the diameter of the lower portion 0 of the hole in therim- (1.

The cup 13 is made deep enough to contain an insert 14 of non-metallicmaterial.

preferably cork in its natural state, which is compressed and forced bya suitable tool (not shown) into the cup through the opening of largerdiameter. The cork insert is made long enough to have its inner endengage the bottom of the cup and its outer end projects beyond the cupand into the portion 6 of larger diameter, wherein the projecting end ofthe cork expands and fills the portion 6 of larger diameter, so that itengages the walls of the portion of larger diameter and covers the edgeof the opening and renders the latter harmless for cutting or otherwiseinjuring the belt (not shown). which coiiperates with the pulley.

The outer portion of the cork insert is of larger diameter than the cupand overlaps the flange 12 of the latter, thereby assisting to attachthe cup 13 to the rim of the pulley. So also, the belt is protected frombeing injured by the flange on the cup. The outer end of the cork insertpreferably extends at its central portionbevond the outer surface of therim, as shown in Figs. 2, 4 and 5.

The cup 13 may be mechanically locked to the rim by expanding the innerend of the cup so as to increase the diameter of the projecting portionof the cup and cause it f to engage the inner surface of the rim, asrepresented in Figs. 2 and 5, which expanded shown the Y but 1 oz: in

h ihin 1; g exiendefi .i one of iiiti'ex eni ennuiei' shoulder em'w acup ext-emi'ei'i through 11 of emaiie'r diameter and having eriofi-Oi'il' in no natural ei'zting on; of the on. of the oyeijamgsubstantially as dein ooh hiimtion, siiheiantialiy 'dtiin objeetprovided with an opening ext-ended through it and having yortions ofdifferent tiiameters a cup inserted into the portion of smallerdiameter, am} an insert of cork in its naijil al having a portionlocated in cup and a portion projecting 3 me}; hiii'i'zg; the portion.of the 5 diameter.

biHZi-LKOR, a subsiantieiiy thin ohi with an opening extended and havingportions of different is a cup inser into the FOI't-IOHOf (immeter,a'nzi an insert of non-- ii inane sm 2.1192

ntxeiallio material having" mportion within said cup-mid another portionprojecting out of file c119 and into the portion of the opening oflarger diameter.

in combination, a. substantially thin oh- =eet rovirled with an opening,a cup ex portion Within said cup and another portion projecting out ofthe cup into the vopening of larger diameter In testimony whereof, Ihave signed my name to this specification in the presence-of twosuhsczibing witnesses.

- j PARKE H. CUSTIS. Witnesses:

JAS. H. CHUROHILB, J. MURPHY.

mated ti'irmigh said opening and having its

